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Normally-Off Computing for Crystalline Oxide Semiconductor-Based Multicontext FPGA Capable of Fine-Grained Power Gating on Programmable Logic Element With Nonvolatile Shadow Register.
- Source :
- IEEE Journal of Solid-State Circuits; Sep2015, Vol. 50 Issue 9, p2199-2211, 13p
- Publication Year :
- 2015
-
Abstract
- Normally-off computing (Noff computing) using a multicontext field programmable gate array (MC-FPGA) consisting of crystalline oxide semiconductor FETs has been developed. The Noff computing discussed in this paper is a control architecture for an MC-FPGA capable of performing fine-grained power gating on each programmable logic element (PLE) whose registers include a volatile register and also a nonvolatile shadow register for storing and loading data in the volatile register. The MC-FPGA performs fine-grained control of power supplied only to PLEs contributing to effective calculation, when context switching happens. With an MC-FPGA fabricated with a hybrid process of a 1.0 µm crystalline oxide semiconductor FET on a 0.5 µm CMOS FET, it has been confirmed that the proposed Noff computing can resume the previous task when a context switches back to it, increases PLE use efficiency, and reduces the power consumption by 27.7% at operating frequencies of 20 MHz with a driving voltage of 2.5 V. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189200
- Volume :
- 50
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- IEEE Journal of Solid-State Circuits
- Publication Type :
- Academic Journal
- Accession number :
- 109243585
- Full Text :
- https://doi.org/10.1109/JSSC.2015.2438824